Pseudotsuga menziesii - Image of this species. Pseudotsuga menziesii var. menziesii - Distribution and occurrence, value and use, characteristics, and fire ecology. Pseudotsuga menziesii var. glauca - Distribution and occurrence, value and use, characteristics, and fire ecology. Coast Douglas Fir - Research project on Pseudotsuga menziesii by Morgan Cook at the University of Wisconsin-LaCrosse. Pseudotsuga menziesii: Douglas Fir - Tree identification fact sheet with photos of the leaf, flower, fruit, twig, bark and form. Pseudotsuga - Description of the genus and its 7 species.